Next time, someone brings up the issue of same sex marriage, try to remember this quote from Father Robert Barron.
Love means to want the good of the other and then to do something about it.
What has happened today, though, is not the real value. What has happened today is toleration and inclusion. Real love means that you're not going to tolerate lots of things. Real love means you have to sometimes exclude certain things.
What has happened is a dangerous conflation of toleration and inclusion with love. Now how dangerous is it? ... well, you might begin to see the devil himself as something beautiful and holy.